IBM L40 SX Quick Reference page 91

4.2.1 Display Problems
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¦ PROBLEM ¦ ACTION
+--------------+---------------------------------------------------------¦
¦ Blank screen ¦ Check to see if:
¦ plus no ¦
¦ beeps. ¦ 1. The charged Rechargeable Battery is correctly
¦ ¦ installed.
¦ Note: If ¦
¦ you are not ¦ 2. The AC Adapter or the Car Battery Adapter is
¦ sure about ¦ connected to the computer and the power cord is
¦ the beeps, ¦ plugged into a working electrical outlet (see page
¦ turn the ¦ 3.1.1.1 on how to use the AC Adapter).
¦ computer ¦
¦ off, then on ¦ 3. The power switch is on.
¦ again. If ¦
¦ no beep ¦ 4. On is specified for the System audio option of the
¦ sounds, the ¦ Set Features Menu.
¦ speaker icon ¦
¦ is not ¦ 5. The math coprocessor just installed is installed
¦ displayed. ¦ correctly.
¦ ¦
¦ ¦ If the above items are correct and the screen still
¦ ¦ remains blank, have the system serviced.
+--------------+---------------------------------------------------------¦
¦ Blank screen ¦ Check to see if:
¦ plus one ¦
¦ beep. ¦ 1. Both brightness and contrast controls on the LCD
¦ ¦ display are properly adjusted when an external PS/2 ¦
¦ Note: Any ¦ display is not attached.
¦ beep is ¦
¦ always ¦ 2. An external PS/2 display is turned on and the
¦ accompanied ¦ brightness and contrast controls are turned up.
¦ by a display ¦ When an PS/2 display is attached, the LCD remains
¦ of the ¦ blank.
¦ speaker ¦
¦ icon. ¦ If the above items are correct and the screen remains
¦ ¦ blank, have the system serviced.
+--------------+---------------------------------------------------------¦
¦ Blank screen ¦ If the dew point (humidity) icon or the temperature
¦ plus two or ¦ icon does not turn on, have the system serviced.
¦ more beeps. ¦
¦ ¦
¦ Note: Any ¦
¦ beep is ¦
¦ always ¦
¦ accompanied ¦
¦ by a display ¦
¦ of the ¦
¦ speaker ¦
¦ icon. ¦
+--------------+---------------------------------------------------------¦
¦ Only the ¦ Have the system serviced.
¦ cursor ¦
¦ appears. ¦
+--------------+---------------------------------------------------------¦
¦ Screen is ¦ Check to see if the screen is still unreadable or
¦ unreadable ¦ distorted by changing a value for the LCD display mode
¦ or ¦ option of the Set Features Menu.
¦ distorted. ¦ this action does not solve the problem, have the system ¦
¦ ¦ serviced.
+--------------+---------------------------------------------------------¦
¦ Wrong ¦ Have the system serviced.
¦ characters ¦
¦ appear on ¦
¦ the screen. ¦
+------------------------------------------------------------------------+
PS/2 Model L40 SX Quick Reference
Display Problems
See page 3.8.3.1.
¦ Copyright IBM Corp. 1991
4.2.1 - 1
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